 In the 1930s, the Leader-Empress section was renumbered to Highway 32 while the Empress-Onion Lake was renumbered to Highway 17 (the section south of Macklin was later decommissioned).At the same time, "Provincial Highway 30" ran from Lemsford, through Glidden and Kindersley, to Kerrobert; the section between Lemsford and Glidden was decommissioned in the 1940s.In the 1960s, Highway 330 was commissioned between Kerrobert, through Unity, to Highway 40 west of Cut Knife.